The FEI’s Prohibited Substances List is divided into two sections - Controlled Medication and *Banned Substances. Controlled Medication substances are those that are regularly used to treat horses, but which must have been cleared from the horse’s system by the time of competition. Banned (doping) substances should never be found in the body of the horse.

In the case of an adverse analytical finding for a Banned Substance, the Person Responsible (PR) is automatically provisionally suspended from the date of notification. The horse is suspended for two months.

The FEI has also introduced the concept of Specified Substances. Specified Substances should not in any way be considered less important or less dangerous than other Prohibited Substances. Rather, they are simply substances which are more likely to have been ingested by horses for a purpose other than the enhancement of sport performance, for example, through a contaminated food substance. In the case of a positive for a specified substance, provisional suspension is not automatic.